Finding the Fourth Proportional to 14,415, 19,892.72 and 7,791

Step by Step Solution

1. Step 1: Write the proportion equation
   14,415 : 19,892.72 = 7,791 : x
2. Step 2: Convert to fraction form
   14,415/19,892.72 = 7,791/x
3. Step 3: Cross multiply
   14,415x = 19,892.72 × 7,791
4. Step 4: Simplify right side
   14,415x = 154,984,181.52
5. Step 5: Solve for x
   x = 154,984,181.52/14,415
6. Step 6: Final answer
   x = 10,751.59